Home / 21,168.40-29,212.71-11,609.16

Finding the Fourth Proportional to 21,168.40, 29,212.71 and 11,609.16

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Solution

The fourth proportional to 21,168.40, 29,212.71 and 11,609.16 is: 16,020.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,168.40 : 29,212.71 = 11,609.16 : x
  2. Step 2: Convert to fraction form
    21,168.40/29,212.71 = 11,609.16/x
  3. Step 3: Cross multiply
    21,168.40x = 29,212.71 × 11,609.16
  4. Step 4: Simplify right side
    21,168.40x = 339,135,024.42
  5. Step 5: Solve for x
    x = 339,135,024.42/21,168.40
  6. Step 6: Final answer
    x = 16,020.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.